/Engine/Source/Runtime/AIModule/Classes/Perception/AISense_Sight.h
Returns information whether new LoS queries have been added
bool RegisterTarget ( [AActor](API\Runtime\Engine\GameFramework\AActor) & TargetActor, const [TFunction](API\Runtime\Core\GenericPlatform\TFunction)< void([FAISightQuery](API\Runtime\AIModule\Perception\FAISightQuery) &)> & OnAddedFunc )